usb: dwc3: keep default hird threshold value as 4b1100

as per data book any HIRD threshold value greater than 4b1100 is
invalid. So set the maximum valid value as default values.

Signed-off-by: Pratyush Anand <pratyush.anand@st.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
1 file changed